处理带Emoji表情的的字符串代码,PHP代码库,德仔网

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【PHP】处理带Emoji表情的的字符串
作者:淑臣 / 发布于2019/9/11/ 711
处理带Emoji表情的的字符串
/// <summary>
??????? /// 带Emoji表情的的字符串
??????? /// [e]1f1e6[/e]
??????? /// [e]1f1fa[/e]
??????? /// [e]1f1e6[/e]
??????? /// </summary>
??????? /// <param name="str"></param>
??????? /// <returns></returns>

??????? public static string ToUnicode(this string str)
??????? {

??????????? foreach (var a in str)
??????????? {
??????????????? byte[] bts = Encoding.Unicode.GetBytes(a.ToString());

??????????????? if (bts.Length != 4 && bts.Length != 5)
??????????????? {
??????????????????? throw new ArgumentException("错误的 EmojiCode 16进制数据长度.一般为4位或5位");
??????????????? }

??????????????? Int32 Bint = System.BitConverter.ToInt32(bts, 0);
??????????????? var mm = UTF16ToEmoji(Bint);
??????????????? string strA = mm.ToString("x");
???????????????

??????????????? str = str.Replace(a.ToString(), strA);

??????????? }
??????????? return str;


??????? }
??????? /// <summary>
??????? /// 返回Emoji表情utf16 对应的int值
??????? /// </summary>
??????? /// <param name="Bint"></param>
??????? /// <param name="LowHeight"></param>
??????? /// <returns></returns>
??????? private static Int32 UTF16ToEmoji(Int32 Bint, bool LowHeight = true)
??????? {

??????????? Int32 Bintf = ~Bint;
??????????? Int32 Bintffh = Bintf >> 16;
??????????? Int32 y = Bintffh ^ 0xffff;
??????????? Int32 Bintfl = Bintf & 0x7fff;
??????????? Int32 x = Bintfl ^ 0xffff;
??????????? //? (((( (x ^ 0xD800) << 2) | ((y ^ 0xDC00) >> 8)) << 8) | ((y ^ 0xDC00) & 0xFF)) + 0x10000
??????????? Int32 Vx = x ^ 0xD800;
??????????? Int32 Vx1 = Vx << 2;
??????????? Int32 Vy = y ^ 0xDC00;
??????????? Int32 Vy1 = Vy >> 8;
??????????? Int32 xy = (Vx1 | Vy1) << 8;

??????????? Int32 N = y ^ 0xDC00;
??????????? Int32 M = N & 0xFF;

??????????? Int32 d = xy | M;
??????????? return d + 0x10000;
??????? }
??????? /// <summary>
??????? /// 把 Emoji编码 [e]1f1e6-1f1fa[/e]
??????? ///???? [e]1f1e6[/e]
??????? ///???? [e]1f1fa[/e]
??????? ///???? [e]1f1e6[/e]
??????? ///???? [e]1f1f9[/e] 换成对应的字符串,此字符串能被window8.1,ios,andriod 直接显示.
??????? ///???? 
??????? /// 如果在网页中显示,需要设置字体为 'Segoe UI Emoji' 如下.当然客户机还必须得有这个字体.
??????? /// 
??????? ///???? <span style="font-family:'Segoe UI Emoji';"></span>
??????? ///???? 
??????? /// </summary>
??????? /// <param name="paramContent"></param>
??????? /// <returns></returns>
??????? public static string GetEmoji(this string paramContent)
??????? {
??????????? StringBuilder newString = new StringBuilder(2000);
??????????? StringBuilder tempEmojiSB = new StringBuilder(20);
??????????? StringBuilder tmps = new StringBuilder(5);

??????????? int ln = paramContent.Length;
??????????? for (int index = 0; index < ln; index++)
??????????? {
??????????????? int i = index; //把指针给一个临时变量,方便出错时,现场恢复.
??????????????? try
??????????????? {

??????????????????? if (paramContent[i] == '[')
??????????????????? {
??????????????????????? //预测
??????????????????????? if (paramContent[i + 1] == 'e')
??????????????????????? {
??????????????????????????? if (paramContent[i + 2] == ']') //[e]的后面4位是 unicode 的16进制数值.
??????????????????????????? {
??????????????????????????????? i = i + 3; //前进3位

??????????????????????????????? i = ChangUnicodeToUTF16(paramContent, tempEmojiSB, tmps, i);

??????????????????????????????? if (paramContent[i] == '-')//向前探测1位 看看是否双字符 形如1f1e7-1f1ea
??????????????????????????????? {
??????????????????????????????????? i++;
??????????????????????????????????? i = ChangUnicodeToUTF16(paramContent, tempEmojiSB, tmps, i);

??????????????????????????????? };

??????????????????????????????? if (paramContent[i] == '[')
??????????????????????????????? {
??????????????????????????????????? if (paramContent[i + 1] == '/')
??????????????????????????????????? {
??????????????????????????????????????? if (paramContent[i + 2] == 'e')
??????????????????????????????????????? {
??????????????????????????????????????????? if (paramContent[i + 3] == ']')
??????????????????????????????????????????? {
??????????????????????????????????????????????? i = i + 3; //再前进4位

??????????????????????????????????????????????? index = i;???????????????????????????? //识别转换成功
??????????????????????????????????????????????? newString.Append(tempEmojiSB.ToString());?? //识别转换成功
??????????????????????????????????????????????? tempEmojiSB.Clear();
??????????????????????????????????????????????? continue;
??????????????????????????????????????????? }
??????????????????????????????????????? }
??????????????????????????????????? }
??????????????????????????????? }

??????????????????????????? }
??????????????????????? }
??????????????????? }

??????????????????? index = i;

??????????????? }
??????????????? catch (Exception ex)
??????????????? {
??????????????????? //解析失败仍然继续吃.
??????????????? }
??????????????? newString.Append(paramContent[index]);

??????????? }
??????????? return newString.ToString();
??????? }

??????? ///// <summary>
??????? ///// 检测字符是否是合法的Emoji字符串
??????? ///// </summary>
??????? ///// <param name="paramContent"></param>
??????? ///// <param name="i"></param>
??????? ///// <returns></returns>



??????? private static int ChangUnicodeToUTF16(string paramContent, StringBuilder tempSB, StringBuilder tmps, int i)
??????? {
??????????? for (int maxln = 0; maxln < 20; maxln++)
??????????? {
??????????????? if (paramContent[i] != '-' && paramContent[i] != '[')
??????????????? {? //向前探测1位
??????????????????? tmps.Append(paramContent[i]);
??????????????????? i++;
??????????????? }
??????????????? else
??????????????? {
??????????????????? break;
??????????????? }
??????????? }


??????????? tempSB.Append(EmojiCodeToUTF16String(tmps.ToString()));

??????????? tmps.Clear();
??????????? return i;
??????? }

??????? /// <summary>
??????? /// EmoJi U+字符串对应的 int 值 转换成UTF16字符编码的值
??????? /// </summary>
??????? /// <param name="V">EmojiU+1F604 转成计算机整形以后的值V=0x1F604 </param>
??????? /// <param name="LowHeight">低字节在前的顺序.(默认)</param>
??????? /// <remarks>
??????? ///参考? 
??????? ///http://blog.csdn.net/fengsh998/article/details/8668002
??????? ///http://punchdrunker.github.io/iOSEmoji/table_html/index.html
??????? /// V? = 0x64321
??????? /// Vx = V - 0x10000
??????? ///??? = 0x54321
??????? ///??? = 0101 0100 0011 0010 0001
??????? ///
??????? /// Vh = 01 0101 0000 // Vx 的高位部份的 10 bits
??????? /// Vl = 11 0010 0001 // Vx 的低位部份的 10 bits
??????? /// wh = 0xD800 //結果的前16位元初始值
??????? /// wl = 0xDC00 //結果的後16位元初始值
??????? ///
??????? /// wh = wh | Vh
??????? ///??? = 1101 1000 0000 0000
??????? ///??? |??????? 01 0101 0000
??????? ///??? = 1101 1001 0101 0000
??????? ///??? = 0xD950
??????? ///
??????? /// wl = wl | Vl
??????? ///??? = 1101 1100 0000 0000
??????? ///??? |??????? 11 0010 0001
??????? ///??? = 1101 1111 0010 0001
??????? ///??? = 0xDF21
??????? /// </remarks>
??????? /// <returns>EMOJI字符对应的UTF16编码16进制整形表示</returns>
??????? private static Int32 EmojiToUTF16(Int32 V, bool LowHeight = true)
??????? {

??????????? Int32 Vx = V - 0x10000;

??????????? Int32 Vh = Vx >> 10;//取高10位部分
??????????? Int32 Vl = Vx & 0x3ff; //取低10位部分
??????????? //Response.Write("Vh:"); Response.Write(Convert.ToString(Vh, 2)); Response.Write("<br/>"); //2进制显示
??????????? //Response.Write("Vl:"); Response.Write(Convert.ToString(Vl, 2)); Response.Write("<br/>"); //2进制显示

??????????? Int32 wh = 0xD800; //結果的前16位元初始值,这个地方应该是根据Unicode的编码规则总结出来的数值.
??????????? Int32 wl = 0xDC00; //結果的後16位元初始值,这个地方应该是根据Unicode的编码规则总结出来的数值.
??????????? wh = wh | Vh;
??????????? wl = wl | Vl;
??????????? //Response.Write("wh:"); Response.Write(Convert.ToString(wh, 2)); Response.Write("<br/>");//2进制显示
??????????? //Response.Write("wl:"); Response.Write(Convert.ToString(wl, 2)); Response.Write("<br/>");//2进制显示
??????????? if (LowHeight)
??????????? {
??????????????? return wl << 16 | wh;?? //低位左移16位以后再把高位合并起来 得到的结果是UTF16的编码值?? //适合低位在前的操作系统
??????????? }
??????????? else
??????????? {
??????????????? return wh << 16 | wl; //高位左移16位以后再把低位合并起来 得到的结果是UTF16的编码值?? //适合高位在前的操作系统
??????????? }


??????? }

??????? /// <summary>
??????? /// 字符串形式的 Emoji 16进制Unicode编码? 转换成 UTF16字符串 能够直接输出到客户端
??????? /// </summary>
??????? /// <param name="EmojiCode"></param>
??????? /// <returns></returns>
??????? private static string EmojiCodeToUTF16String(string EmojiCode)
??????? {
??????????? if (EmojiCode.Length != 4 && EmojiCode.Length != 5)
??????????? {
??????????????? throw new ArgumentException("错误的 EmojiCode 16进制数据长度.一般为4位或5位");
??????????? }
??????????? //1f604
??????????? int EmojiUnicodeHex = int.Parse(EmojiCode, System.Globalization.NumberStyles.HexNumber);

??????????? //1f604对应 utf16 编码的int
??????????? Int32 EmojiUTF16Hex = EmojiToUTF16(EmojiUnicodeHex, true);???????????? //这里字符的低位在前.高位在后.
??????????? //Response.Write(Convert.ToString(lon, 16)); Response.Write("<br/>"); //这里字符的低位在前.高位在后.
??????????? var emojiBytes = BitConverter.GetBytes(EmojiUTF16Hex);???????????????????? //把整型值变成Byte[]形式. Int64的话 丢掉高位的空白0000000??

??????????? return Encoding.Unicode.GetString(emojiBytes);
??????? }
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